tril·​lion | \ ˈtri(l)-yən How to pronounce trillion (audio) \

Definition of trillion

1 : a number equal to 1,000 times one billion — see Table of Numbers
2 : an indeterminately large number a trillion mosquitoes out tonight

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Other Words from trillion

trillion adjective
trillionth \ ˈtri(l)-​yən(t)th How to pronounce trillionth (audio) \ adjective or noun

Examples of trillion in a Sentence

Recent Examples on the Web Not to make their own trillion bucks, but to make our lives better. Steven Levy, Wired, "Big Tech Has a Trillion-Dollar Problem," 7 Feb. 2020 Meanwhile, the logistics of applying those standards in any reasonable and coherent way—across 2.5 billion worldwide monthly active users who share trillions of posts and photos—remain challenging at best. Kate Cox, Ars Technica, "What it takes to get a hate page off Facebook: A letter from the state AG," 6 Feb. 2020 That’s what a passionate band of neuroscientists aspire to for the human brain: mapping the meanderings of its 86 billion neurons and their trillions of connections. Sharon Begley, STAT, "A ‘landmark’ achievement: Scientists trace full wiring diagram of the fly brain’s core," 22 Jan. 2020 In the end, financial institutions like Citi, Bank of America, JP Morgan Chase, Wells Fargo, and Goldman Sachs walked away with, by some accounts, trillions. Melissa Gira Grant, The New Republic, "How the Democratic Party Learned to Wage Class Warfare," 25 Dec. 2019 Americans may love their smartphones, but all those free apps aren’t worth trillions of dollars. Derek Thompson, The Atlantic, "The Real Trouble With Silicon Valley," 17 Dec. 2019 The ability to track, report and deliver payment on hundreds of billions -- and, soon, trillions -- of microtransactions, while providing the latest in database management, data mining and data analysis, is what rules distribution. Dan Rys, Billboard, "125 Years of Billboard: How the Music Business Changed Across Decades," 14 Nov. 2019 AP China’s global payments wallet Alipay handles trillions of dollars of payments and has over 1 billion active users, but until recently most foreign tourists to China weren’t among them. Jane Li, Quartz, "How to set up and use an Alipay account as a tourist in China," 9 Dec. 2019 Mainframe computers driven by paper punch cards have given way to supercomputers running trillions of calculations in 1 second. Warren Cornwall, Science | AAAS, "Even 50-year-old climate models correctly predicted global warming," 4 Dec. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trillion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of trillion

1690, in the meaning defined at sense 1

History and Etymology for trillion

French, from tri- + -illion (as in million)

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Time Traveler for trillion

Time Traveler

The first known use of trillion was in 1690

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Statistics for trillion

Last Updated

17 Feb 2020

Cite this Entry

“Trillion.” Dictionary, Merriam-Webster, Accessed 24 Feb. 2020.

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More Definitions for trillion


How to pronounce trillion (audio)

English Language Learners Definition of trillion

: the number 1,000,000,000,000 : one thousand billion
: a very large amount or number
British, old-fashioned : the number 1,000,000,000,000,000,000 : one million million million


tril·​lion | \ ˈtril-yən How to pronounce trillion (audio) \

Kids Definition of trillion

: a thousand billions

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